Means for bleeding turbines for industrial purposes.



F. HODGKINSON, MEANS POR BLEEDING TURBINES FOR INDUSTRIAL PURPOSES. APPLICATION FILED 00T. 8, 1909. RENEWED JUNE 8, 1912.

1,971,420 Patented w13.

2 SHEETS-SHEET l.

' F. HODGKINSON. MEANS FOR BLBEDING TURBINBS FOR INDUSTRIAL PURPOSES, APPLICATION FILED 00T, 8, 1909. BENEWED JUNE 8, 1912.

L?1,420 Patented Aug.26, 1913.

zvenl UNITED sTATns Tan` onion.

FRANCIS HODGKINSON, OF EDGEIOO'D PARK, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE COLONIAL TRUST COMPANY, TRUSTEE, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION GF PENNSYLVANIA.

MEANS FOR BLEEDING TURBINES FOR INDUSTRIAL PURPOSES.

Specification of Letters Patent.

Patented Aug. 26, 191,3.

Application led October 8, 1909, Serial No. 521,745. Renewed .Tune 8, 1912. vSerial No. 702,634.

T aZl whom 'it may concern:

Be it known that I, FRAM/is HODGKINsoN, a subject of the King ot' Great Britain and Ireland, and a resident of Edgewood Park, in the county of Allegheny and State of Pennsylvania, havemade a new vand useful Invention in .Means for Bleeding Highlress'ure Steam from rI lurloines for Industrial Purposes, of Which the following is a specification.

This invention relates to turbines and particularly to means for bleeding motive fluid from the turbine and for 'utilizing it for heating or for industrial purposes.

An objectof this invention is to produce means for delivering motive liuid from a turbine and for maintaining the fluid pressure approximately constant in the turbine at thepoint of delivery.

It is frequent-ly desirable to employ steam, at a pressure lower than the available pressure, in heating systems or for use in cooking or other industrial purposes and it is of course desirable to conserve the energy of the steam and to employ the expansive force in performing useful work. \Vith my invent-ion I am able to deliver steam of any pressure ranging from boiler pressure to condenser pressure and to utilize the steam nzost elliciently.

In the drawings accompanying this ap- )lication and formino' a )art thereof' r l v Figure 1 is a longitudinal section on the line 1er-1 ol Fig. El and illustrates a turbine of the. Parsons type equipped with my invention; and Fig. Q is a transverse section along the line 2-2 of Fig. 1.

Referring to the drawings, the turbine shown is divided into three stages, an initial or high pressure stage 3, an intermediate stage #l and a low pressurestage 5. Motive fluid is delivered to thel turbine through an inletport. formed in the turbine casing (l and communicating with an annular passage 7 which is located within the easing and surroundsthe rotor` element of the turbinehaust port S provided in the turbine casing. The lluid in traversing the working stages of the `turbine is expanded and the pressure varies throughout the length of the turbine from initial or inlet pressure to exha ust pressure.

In the drawings, I have illustrated means for delivelrin,1 l the fluid discharged from the intermediate stage of the turbine lo a coil 9 which may be employed for heating or for any other industrial l pose. -I have also shown means for, maintmning the lluid pressure at the exhaust end of the intermediate stage t apln'oximately constant or constant Within close limits. I provide a partition 1l on the casing (3 of the turbine which projects into close proximity with the turbine rotor and is provided with a fluid seal olf ordinary construction which is located between it and the rotor. lhis partition l1 divides the turbine into two parts so that the fluid .discharged from the intermediate stage 4C cannot enter the final stage except by traversingl a port 13 Jformed in the casing, a passage provided within a valve easing` 1l and a port 15 1ovide l;in the turbine casing` The casing Il .is provided with ports lo which are controlled by a valve 17 and through which the lluid must pass in its passage from the port. 13 to the port l5. A port 1S is provided .in the turbine casing (i and is located between the exhaust end of the stage 4 and the valve 17 Piping 20 communicates with the port 18 and may deliver tluid to the heating coil 9 or -to any other apparatus utilizing low pressure steam.

The valve, 17 is provided with an adjustyable weight 19 and maintains a predetermined pressure within the turbine easingat the exhaust end of the stage 4. Then sufficient steam is delivered to the turbine to cause the pressure at that point to build up above the determined pressure the valve 1T v is lifted and is'caused to open the ports 1G and deliver a portion of the motive hrid discharged trom the stage l to the low pressure stage 5 of the turbine. The valve 1T will open varying au'iounts dependent upon the amount. ot' steam exhausted from the stage 1. and will maintain the pressure at the inlet tothe port 13 approximately constantor eonstant Within .close limits, it will. be apparent that the valve 17 ina'ylbe springl controlled or may be replaced by any suitableapparatus .for maintaining a 'constant .fluid pressure,

in order that the longitudinal thrusts on the turbine rotor may be counterbalaneed l provide balaneingl drums 2l 22 and 23 of ordinary construction for tue high, intermediate and low pressure stages respectively. The drinn 2l is exposed'on one side to the inlet pressure of the stage 3. The drum 22 is exposed on one side to the' inlet pressure ot the stage 4. through a passage 2li and the drinn 23 is exposed to the inlet pressure of the stage 5 through a pipe The thrust oceasionedby the iiuid seal l2 between the partition ll and the rotor may be balanced by making it of equal. diameter with the drum 22 or by making it of equal 'diameter with the exhaust end. oli" the stage L as shown in the drawings.

Having now described my invention, what l claim iszl., In a multi-stage turbine, a dividing partition between tivo adjaeent stages, a port located on the admission side of said partition for deliverir liuid from said turbine, a passage aroune. .aid partition, and a valve in said passage the operation of which is dependent upon the pressure on tbe admission side of said partition for controlling tbe delivery of fluid around said partition.

2. ln a tivo-bearing inuitistage steam turbine, a dividing partition between two adjacent stages, a port located on'the ad inission side of said partition for delivering fluid troni said turbine, a steam passage around said partition, and a valve the oper ation of which is dependent upon the pressure on the admission side'of partition i. r emitrolling"the delivery of iuid around partitionn I' two-bearing steam between two adjacent dig; steam door' between A a valyed steam' passa l ition. conne sai( st;

' the portion of e musted :trein -the first offsaid trbine, a. :fr l A tividinig the interior et sL l turbine into. tivo parte and adapt i to i nl steam `timv between sai' l der port located. on the leigh p essere sideot' said partition, a steam around ysaid partition connecting said parte a controliable valve in said. passage, aut.

.tneans the operation et which is dependent upon the pressure of the 'steam on the high rpt/naso side of said Valve for utilizing steam from,

said turbine.

6. ln a turbine, means for dividing the interior passages of the turbine into two parts, a port located in the turbine casing on the admission side of said means tordelivering fluid from' said turbine to a source of consumptionoutside the turbine, a port in the dividing means whereby steam may pass from one part of the turbine into the other, and a valve for maintaining a constant pressure in that part 'of the turbine from which the first .nal-'ned port leads, said valve beine,r controlled by'pressure to determin vthe effective port area of the seo' 'ond mentioned port.

31. in aA4 turbine, apartition dividing fthe interior passages of the turbine into two parte, a port located on` the admission side of said partition for .delivering fluid from said turbine, and a valve the; operation of which is dependent upon the pressure on the admission side of said partit-ion controlling the delivery of fiuid around said partition from one part et' the turbine to another.y

8. ln turbine, means. for dividing the interior passages of the turbine into twoV the paies of turbine and for controlli4 otner.

ii es et the turbine into tufo pz tue operation o nfnicb is deperv nt upon the pressure on the admission side et said partition, controlling the delivery et tiuid around said partition and from one part of the turbine to another, and an open servies yport between tivo adjacent stages. ln

of @oto Fl ANCI@ HODGHSN.

7, lveGnnn, Banner.

the delivery of iuid from one part bine, a partition. dividingthe l roo said turbine, and a valve :using a constant pressure in one. i

testimony whereof, l have hereunto 

